<title>trj file format</title>
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<h2>trj file format</h2>
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<h3>Description</h3>
Files with the trj file extension contain the trajectory of a simulation. 
In this file all the coordinates, velocities, forces and energies are 
printed as you told GROMACS in your mdp file. This file is in binary 
format an can be read with <a href=gmxdump.html>gmxdump</a>.
<PRE>
% <a href="gmxdump.html">gmxdump</a> -f traj.trj
</PRE>
or if you're not such a fast reader:
<PRE>
% gmxdump -f traj.trj | more
</PRE>

<p>
You can also get a quick look in the contents of the file (number of 
frames etc.) using:
<PRE>
% <a href="gmxcheck.html">gmxcheck</a> -f traj.trj
</PRE>
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